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Table 2 Average wear rate reduction by use of ceramic-ceramic material combination

From: Manufacturing conditioned roughness and wear of biomedical oxide ceramics for all-ceramic knee implants

Combination CoCr-PE Ceramic-ceramic (Single-curved, group 1) Ceramic-ceramic (Double-curved, group 2)
Average wear rate [mm 3 /10^6 cycles] 2.54 0.31 0.53
Improvement to CoCr-PE [%]   87.5 79.1